You can find a vim script in kdesdk/scripts/kde-devel-vim.vim that helps you to keep the coding style correct. In addition to defaulting to the kdelibs coding style it will automatically use the correct style for Solid and kdepim code. If you want to add rules for other projects feel free to add them in the SetCodingStyle function.

+

+

To use the script, include it in your ~/.vimrc like this:

+

<code>

+

source /path/to/kde/sources/kdesdk/scripts/kde-devel-vim.vim

</code>

</code>

Revision as of 20:17, 15 February 2007

This document describes the recommended coding style for kdelibs. Nobody is forced to use this style, but to have consistent formating of the source code files it is recommended to take use of it.

Whitespace

For pointers or references, use a single space before '*' or '&', but not after

No space after a cast

Example:
// wrong
QString* myString;
if(true){
}

// correct
QString *myString;
if (true) {
}

Braces

As a base rule, the left curly brace goes on the same line as the start of the statement.

Example:
// wrong
if (true)
{
}

// correct
if (true) {
}

Exception: Function implementations and class declarations always have the left brace on the start of a line.

Example:
void debug(int i)
{

qDebug("foo: %i", i);

}

class Debug
{
};

Use curly braces when the body of a conditional statement contains more than one line, and also if a single line statement is somewhat complex.

Example:
// wrong
if (true) {

return true;

}

for (int i = 0; i < 10; ++i) {

qDebug("%i", i);

}

// correct
if (true)

return true;

for (int i = 0; i < 10; ++i)

qDebug("%i", i);

Exception 1: Use braces also if the parent statement covers several lines or wraps.

Example:
if (address.isEmpty() || !isValid()

|| !codec) {
return false;

}

Exception 2: Use braces also in if-then-else blocks where either the if-code or the else-code covers several lines.

Example:
// wrong
if (true)

return true;

else {

++it;
return false;

}

// correct
if (true) {

return true;

} else {

++it;
return false;

}

Switch statements

Case labels are on the same column as the switch

Example:
switch (myEnum) {
case Value1:

doSomething();
break;

case Value2:

doSomethingElse();
// fall through

default:

defaultHandling();
break;

}

Artistic Style (astyle) automatic code formatting

You can use astyle (<=1.19) to format code or to test if you have followed this document. Run the following command:
astyle --indent=spaces=4 --brackets=linux --indent-labels --pad=oper --unpad=paren --one-line=keep-statements --convert-tabs --indent-preprocessor
`find -type f -name '*.cpp'` `find -type f -name '*.h'`

Vim script

You can find a vim script in kdesdk/scripts/kde-devel-vim.vim that helps you to keep the coding style correct. In addition to defaulting to the kdelibs coding style it will automatically use the correct style for Solid and kdepim code. If you want to add rules for other projects feel free to add them in the SetCodingStyle function.

To use the script, include it in your ~/.vimrc like this:
source /path/to/kde/sources/kdesdk/scripts/kde-devel-vim.vim

Document started by Urs Wolfer. Some parts of this document have been adopted from the Qt Coding Style document posted by Zack Rusin on kde-core-devel.